Discrepancies in String Literal Conversion to 'char*' Between C and C
In C, the conversion from a string literal to 'char*' is considered valid, while in C , it's deemed invalid. This seeming contradiction arises from the differences in how the languages treat string literals.
C : String Literal as 'const char*'
The C 11 Standard explicitly states that string literals should be treated as 'const char*'. This restriction stems from the fact that string literals are immutable, meaning any attempt to modify them would result in undefined behavior. As a safeguard, C restricts their manipulation by treating them as constant character arrays.
C: Implicit Conversion to 'char*'
In contrast, C allows the implicit conversion of string literals to 'char*'. This behavior is a remnant from earlier versions of C and has been deprecated. However, it remains valid in C due to the prevalence of existing code that relies on this conversion.
Explicit Cast in C
To address the invalidity of the implicit conversion in C , a cast can be added to explicitly convert the string literal to 'char*'. While this allows the code to compile, it's not a recommended solution as it does not fix the underlying issue of potentially modifying an immutable string literal.
Recommended Approach
To ensure code that is safe in both C and C , it's best to declare the pointer using the correct type, namely 'const char*'. This eliminates the possibility of unintentional modifications to the string literal and maintains consistency between the two languages.
The above is the detailed content of Why Does String Literal Conversion to `char*` Differ Between C and C ?. For more information, please follow other related articles on the PHP Chinese website!

This article details C function return types, encompassing basic (int, float, char, etc.), derived (arrays, pointers, structs), and void types. The compiler determines the return type via the function declaration and the return statement, enforcing

This article explains C function declaration vs. definition, argument passing (by value and by pointer), return values, and common pitfalls like memory leaks and type mismatches. It emphasizes the importance of declarations for modularity and provi

Gulc is a high-performance C library prioritizing minimal overhead, aggressive inlining, and compiler optimization. Ideal for performance-critical applications like high-frequency trading and embedded systems, its design emphasizes simplicity, modul

This article details C functions for string case conversion. It explains using toupper() and tolower() from ctype.h, iterating through strings, and handling null terminators. Common pitfalls like forgetting ctype.h and modifying string literals are

This article examines C function return value storage. Small return values are typically stored in registers for speed; larger values may use pointers to memory (stack or heap), impacting lifetime and requiring manual memory management. Directly acc

This article analyzes the multifaceted uses of the adjective "distinct," exploring its grammatical functions, common phrases (e.g., "distinct from," "distinctly different"), and nuanced application in formal vs. informal

This article explains the C Standard Template Library (STL), focusing on its core components: containers, iterators, algorithms, and functors. It details how these interact to enable generic programming, improving code efficiency and readability t

This article details efficient STL algorithm usage in C . It emphasizes data structure choice (vectors vs. lists), algorithm complexity analysis (e.g., std::sort vs. std::partial_sort), iterator usage, and parallel execution. Common pitfalls like


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

Dreamweaver Mac version
Visual web development tools

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

SublimeText3 Mac version
God-level code editing software (SublimeText3)

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
